Commissioning
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13
6 720 811 270 (2015/04)
AGS10-2, AGS10E-2, AGS20-2, AGS50-2
6.2.1
Purging the pipework
▶ Use a hose [1] to connect the DFV on the safety assembly to the mains
water supply.
▶ To drain the water away, connect a hose [2] to the DFV on the flow
limiter.
Fig. 19 Solar pump station with ball valves and check valves in the
thermometers
[1]
Hose for water supply
[2]
Hose for water drainage
▶ Open all shut-off devices.
▶ Close the right-hand ball valve [2] on the solar pump station and the
ball valve on the air vent (
Fig. 21, [2]).
▶ Purge the pipework, making sure that the maximum operating
pressure is not exceeded.
▶ Shut off the water supply.
▶ Close the fill and drain valves [3] in the solar pump station.
Fig. 20
[1]
Left-hand ball valve completely open (0°)
[2]
Right-hand ball valve closed (90°)
[3]
Fill & drain valves in the solar pump station
6.2.2
Carrying out a tightness test with water
The solar thermal system is vented by opening the plug screw [2] on the
automatic air vent valve.
▶ Open the ball valve [2].
▶ Unscrew the plug screw [1] one turn.
Fig. 21 Opening the air vent valve
[1]
Shut-off screw
[2]
Ball valve
▶ Set the ball valves [1] on the thermometers to 45° and open the flow
limiter [2] and other shut-off devices.
▶ Carry out a tightness test, observing the permissible pressures for all
assemblies.
▶ After the tightness test: drain the water and clean the automatic air
vent valve.
Fig. 22 Opened shut-off devices
[1]
Ball valves and gravity brake open on the thermometers
(45° position)
[2]
Flow limiter open
If a pre-cooling vessel is installed:
▶ Disconnect the pre-cooling vessel from the solar
circuit while flushing so that the fluid remaining in the
pre-cooling vessel does not get mixed with the heat
transfer medium.
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